These pants are designed as if they were cut from a flight suit and remade. They are made of ripstop material. The waist is made of elastic and a drawstring for easy wear. The crotch part is made of ribbed gussets for ease of movement. 70% Cotton, 30% Nylon Separate Fabric: 100% Cotton Elastic Tape: 80% Cotton, 15% Polyester, 5% Polyurethane Made In Japan Product Code: EK-945, EK-945LPA, EK-945LPB